SmogRank / Countries / Slovakia / September 2025

Most polluted cities in Slovakia, September 2025

32 cities in Slovakia ranked by their average PM2.5 over the 30 days. Worst: Trebišov at 9.3 µg/m³, #563 of 2,439 cities in the world. Cleanest: Devínska Nová Ves at 5.6. A city needs measurements on 70% of the days to be ranked.

  1. 1TrebišovKošice Region
    9.3
  2. 1BardejovPrešov Region
    9.3
  3. 3PrešovPrešov Region
    9.2
  4. 4PúchovTrenčín Region
    9.0
  5. 5LučenecBanská Bystrica Region
    8.5
  6. 6KošiceKošice Region
    8.4
  7. 6ŽilinaŽilina Region
    8.4
  8. 8SninaPrešov Region
    8.3
  9. 9HumennéPrešov Region
    8.1
  10. 10ČadcaŽilina Region
    8.0
  11. 11MartinŽilina Region
    7.7
  12. 12RužomberokŽilina Region
    7.6
  13. 12NitraNitra Region
    7.6
  14. 14KomárnoNitra Region
    7.5
  15. 15Vranov nad TopľouPrešov Region
    7.4
  16. 15SenecBratislava Region
    7.4
  17. 17Liptovský Mikulᚎilina Region
    7.3
  18. 17BratislavaBratislava Region
    7.3
  19. 19TrnavaTrnava Region
    7.1
  20. 19SereďTrnava Region
    7.1
  21. 19PartizánskeTrenčín Region
    7.1
  22. 22ZvolenBanská Bystrica Region
    6.9
  23. 23TrenčínTrenčín Region
    6.8
  24. 23MalackyBratislava Region
    6.8
  25. 25SenicaTrnava Region
    6.6
  26. 25PrievidzaTrenčín Region
    6.6
  27. 27PezinokBratislava Region
    6.5
  28. 28Žiar nad HronomBanská Bystrica Region
    6.2
  29. 28Banská BystricaBanská Bystrica Region
    6.2
  30. 30PopradPrešov Region
    5.9
  31. 31HandlováTrenčín Region
    5.6
  32. 31Devínska Nová VesBratislava Region
    5.6
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

All cities in the world, September 2025 · Slovakia now